Sewing-machine shuttle



(No Model.) 1 T. F. UNGEMAOH.

SEWING MACHINE SHUTTLE.

No. 271,552. Patented Jan.30, 1883.

INVENTOR WITNESSES UNITED STATES PATENT OFFICE.

THEOBALD F. 'UNGEMACH, OF ZANESVILLE, OHIO.

SEWING-MACHINE SHUTTLE.

SPECIFICATION forming part of Letters Patent No. 271,552, dated January30, 1883.

Application filed November 20, 1882. (No model.)

at Zanesville, in the county of Muskingum and State of Ohio, haveinvented a new and useful Sewing-Machine Shuttle, of which the followingis a specification, reference being had to the accompanying drawings.

This invention relates to sewing-machine shuttles; and it consists incertain improvements in the construction of the same, which will behereinafter fully described, and particularly pointed out inthe claim.

In the drawings hereto annexed, Figure 1 is a perspective View of myimproved sewingmachine shuttle. Fig. 2 is a longitudinal verticalsection of the same, and Fig. 3 is a detail view of the tension-sprin gand adj listing-screw detached.

The same letters refer to the same parts in all the figures.

The object of my invention is to provide sewing-machine shuttles with asimple and convenient tension device, by means of which the movement ofthe bobbin may be retarded without passing the thread through a seriesof friction-openings, as is now commonly done, whereby the thread isinvariably more or less Worn and damaged. This I accomplish by theconstruction and arrangement of parts which I shall now proceed morefully to describe with reference to the drawings, in which A representsthe body of my improved shuttle, which is mainly of the ordinaryconstruction, and provided with the recess B to receive the bobbin 0. Onone side of the slot or recess B the shuttle is provided with a slot, D,across which is'secured a guide-bar, E. On the other side of the recessis an opening or eye, F, forming a thread-guide. The heel of the shuttleis provided with a longitudinal screw-threaded opening, G, to receive ascrew, H, provided in its inner end with a recess, I, in which is fitteda spring, J, carrying at its outer end a plate, K, forming a bearing forone end of the bobbin. A hearing for the other end of the bobbin isformed at the front end of the recess B.

The operation and advantages of my invention will be readily understoodfrom the foregoing description, taken in connection with the drawingshereto annexed.

By manipulating the screw the pressure of the spring may be regulated,so as to retard themotion of the bobbin to any desired extent.

Forsewing in light fabric the thread may be threaded through the slotD,over the guidebar E, and through the eye F. For heavy goods it will befound sufficient to'pass it through the eye F.

I claim as my invention and desire to secure by Letters Patent of theUnited States As an improvement in sewing-machine shutties, the body A,having recess B, slot D, guide-bar E, and eye F, and provided in itsheel with a longitudinal screw-threaded opening, G, in combination withthe screw H, having recess I, spring J, and bearing-plate K, as and forthe purpose set forth.

In testimony that I claim the foregoing as my own I have hereto affixedmy signature in presence of two witnesses.

THEOBAIJ) FREDRIOK UNGEMACH.

Witnesses HENRY (J. WERNER, EDWARD ASHE.

